Cov khaub ncaws hauv tsev, tseem hu ua cov khaub ncaws uas kuaj, xa mus rau cov khaub ncaws ua haujlwm tau siv los tiv thaiv lub cev thiab cov khaub ncaws sab hauv lub sijhawm sim. Lawv feem ntau nyob ntev {1} sleced, lub hauv caug- ntev, thiab feem ntau yog xim dawb, yog li lawv tau hu ua cov tsho dawb.
Feem ntau, paj rwb yog siv los ua cov khoom siv rau ua rau nws kom nws tuaj yeem ntxuav nrog high- kub dej.
